Method of transmitting a transport block and apparatus using the same
Provided are a method and apparatus for determining a transport block size (TBS) when transmitting a transport block through a PUSCH by applying transport block processing over multiple slots (TBoMS) in a wireless communication system. The UE determines the TBS based on the number of resource elements (N RE ) allocated for the PUSCH, in this case, considers the number of slots for the TBoMS.
1. A method of transmitting a transport block (TB) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving downlink control information (DCI);
determining a transport block size (TBS) of the TB; and
transmitting the TB having the TBS through a plurality of slots for a physical uplink shared channel (PUSCH) scheduled by the DCI,
wherein the TBS is determined based on a number of resource elements (REs) allocated for the PUSCH (N RE ),
wherein the N RE is determined based on a following equation,
N RE =N·min(156, N′ RE )·n PRB , where the N denotes a number of the plurality of slots, the N′ RE denotes a number of resource elements allocated for PUSCH within a physical resource block, and the n PRB denotes a number of allocated physical resource blocks for the UE.
2. The method of claim 1 , wherein the transmission of the PUSCH through the N slots is repeated K times.
3. The method of claim 2 , wherein a same symbol allocation is applied to each of a number of slots (N·K) obtained by multiplying the N and the K related to repeated transmission of the PUSCH.
4. The method of claim 3 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the N·K slots.
5. The method of claim 1 , wherein depending on whether the transport block is transmitted in a plurality of slots or is transmitted in one slot, a formula for determining the number of resource elements allocated for the PUSCH (N RE ), which is used to determine the TBS, is different.
6. An apparatus configured to control a user equipment (UE) in a wireless communication system, the apparatus comprising:
a processor; and
a memory coupled with the processor,
wherein the processor is adapted to:
determine a transport block size (TBS) of a transport block (TB); and
transmit the TB having the TBS through a plurality of slots for a physical uplink shared channel (PUSCH),
wherein the TBS is determined based on a number of resource elements (REs) allocated for the PUSCH (N RE ),
wherein the N RE is determined based on a following equation,
N RE =N·min(156, N′ RE )·n PRB , where the N denotes a number of the plurality of slots, the N′ RE denotes a number of resource elements allocated for PUSCH within a physical resource block, and the n PRB denotes a number of allocated physical resource blocks for the UE.
7. The apparatus of claim 6 , the processor is further adapted to:
receive downlink control information (DCI) for scheduling the PUSCH,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource assignment table, and
wherein the specific row comprises information about the N.
8. The apparatus of claim 7 , wherein the specific row further informs of a slot offset between the DCI and the PUSCH, a start symbol and allocation length of the PUSCH, a mapping type of the PUSCH, and a number of repetitions (K) to be applied to a transmission of the PUSCH.
9. The apparatus of claim 6 , wherein the transmission of the PUSCH through the N slots is repeated K times.
10. The apparatus of claim 9 , wherein a same symbol allocation is applied to each of a number of slots (N·K) obtained by multiplying the N and the K related to repeated transmission of the PUSCH.
11. The apparatus of claim 10 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the N·K slots.
12. The apparatus of claim 6 , wherein depending on whether the transport block is transmitted in a plurality of slots or is transmitted in one slot, a formula for determining the number of resource elements allocated for the PUSCH (N RE ), which is used to determine the TBS, is different.
13. A base station (BS) comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor operating in connected to the transceiver,
wherein the processor is adapted to:
transmit downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to a user equipment (UE); and
receive a transport block (TB) having a specific transport block size (TB S) from the UE through a plurality of slots for the PUSCH,
wherein the TBS is determined based on a number of resource elements (REs) allocated for the PUSCH (N RE ),
wherein the N RE is determined based on a following equation,
N RE =N·min(156, N′ RE )·n PRB , where the N denotes a number of the plurality of slots, the N RE denotes a number of resource elements allocated for PUSCH within a physical resource block, and the n PRB denotes a number of allocated physical resource blocks for the UE,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource allocation table, and
wherein the specific row comprises information for the number of the plurality of slots (N).
14. The BS of claim 13 , wherein the specific row further information for a slot offset between the DCI and the PUSCH, a start symbol and allocation length of the PUSCH, a mapping type of the PUSCH, and a number of repetitions (K) to be applied to a transmission of the PUSCH.
15. The BS of claim 13 , wherein a same symbol allocation is applied to each of a number of slots (N·K) obtained by multiplying the N and the K related to repeated transmission of the PUSCH.
16. The BS of claim 15 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the N·K slots.
17. The BS of claim 13 , wherein depending on whether the transport block is transmitted by the UE in a plurality of slots or is transmitted by the UE in one slot, a formula for determining the number of resource elements allocated for the PUSCH (N RE ), which is used to determine the TBS, is different.
18. An apparatus configured to operate in a wireless communication system, the apparatus comprising:
a processor; and
a memory coupled with the processor,
wherein the processor is adapted to:
transmit downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to a user equipment (UE); and
receive a transport block (TB) having a specific transport block size (TBS) from the UE through a plurality of slots for the PUSCH,
wherein the TBS is determined based on a number of resource elements (REs) allocated for the PUSCH (N RE ),
wherein the N RE is determined based on a following equation,
N RE =N·min(156, N′ RE )·n PRB , where the N denotes a number of the plurality of slots, the N RE denotes a number of resource elements allocated for PUSCH within a physical resource block, and the n PRB denotes a number of allocated physical resource blocks for the UE,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource allocation table, and
wherein the specific row comprises information for the number of the plurality of slots (N).
19. The apparatus of claim 18 , wherein the specific row further information for a slot offset between the DCI and the PUSCH, a start symbol and allocation length of the PUSCH, a mapping type of the PUSCH, and a number of repetitions (K) to be applied to a transmission of the PUSCH.
20. The apparatus of claim 18 , wherein a same symbol allocation is applied to each of a number of slots (N·K) obtained by multiplying the N and the K related to repeated transmission of the PUSCH.
21. The apparatus of claim 20 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the N·K slots.
22. The apparatus of claim 18 , wherein depending on whether the transport block is transmitted by the UE in a plurality of slots or is transmitted by the UE in one slot, a formula for determining the number of resource elements allocated for the PUSCH (N RE ), which is used to determine the TBS, is different.